index = int(input("请输入0-100的指数:"))
# if语句条件后面要加:
# if语句的多条指令看首行缩进情况
if index > 50:
    print("GOOD")
    print("^_^")
else:
    print("BAD")

a = 100
# and----&&
if a < 200 and a > 50:
    print(a)
# or----||
if a > 50 or a > 200:
    print(a)
# not----!
if not a > 200:
    print(a)
